Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68aa4228e53de5f…

MALICIOUS

PDF

106.9 KB Created: 2020-08-30 20:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dca2f162bd5eb166c31c01cce2c5a61 SHA-1: db5ddfe5fd1c8c1cd1296f94b5475779c1360657 SHA-256: f68aa4228e53de5f5151c0ab5f4b4ee2ff5a10dd251df2daffcc21b111e45ab4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link is designed to trick users into believing they are accessing educational material, but it leads to malicious infrastructure. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious redirector.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=cisco+introduction+to+networks+lab+manual+answers
    • https://cdn.shopify.com/s/files/1/0434/6943/9141/files/oxford_thesaurus.pdf
    • https://cdn.shopify.com/s/files/1/0440/0375/4142/files/tcfp_fido_login.pdf
    • https://cdn.shopify.com/s/files/1/0447/5237/1863/files/guia_ceneval_preparatoria.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4810/files/cornerstone_lms_user_guide.pdf
    • https://static.usrfiles.com/ugd/89c6ad_99cbcf5d80024142aeed440ca1f081a7.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/xawipemakedujud.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/vobaseke.pdf
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/35550097046.pdf
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/character_vocabulary_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/5875/5749/files/bu_kek_siansu_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/20151746297.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001651a.bin
2fa998cbe1b54c39c6fae84b72222f7c77e2c3c7109422b3a68256bc905fbe71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1651A 5284 bytes
font_01_sfnt_off00017708.bin
6465bb8df54e63b79ad4abe62982042832ca1fe96124e9569cff9804caf93d95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17708 11752 bytes

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